The outage on Microsoft's Windows Azure cloud computing platform that caused the government's G-Cloud service to go offline was the result of a calculation error caused by the extra day in February due to the leap year.
Writing on the Azure blog the firm's corporate vice president for service and cloud, Bill Laing, said while the firm had still to fully determine the cause of the issue, the extra date in the month appeared the most likely cause.

If the world's (arguably) premiere software company, with all the lessons learned and experience gained during decades of development could have had a disastrous outage caused by an extra day,
then all those who bitch that all the money and effort spent on the Y2K fixes were a waste and that we were hoodwinked by a bunch of grouchy, grimy COBOL programmers looking for a last big payout can just shut the FUCK up.